No, a brittle star is not an arthropod. Brittle stars belong to the phylum Echinodermata, while arthropods belong to the phylum Arthropoda.
Is a brittle star an inverterbrate?
Yes, a brittle star is an invertebrate. As mentioned earlier, brittle stars belong to the phylum Echinodermata, which is a group of marine animals that do not have a backbone (i.e., they are invertebrates). Other examples of invertebrates include insects, mollusks, and crustaceans, among others.
Is the brittle star jointed covering over the body or no joint covering
Brittle stars do not have a jointed covering over their body. They have a unique body structure that is characterized by a central disc and elongated slender arms that are often covered in spines. The spines are not jointed, but they have a flexible and articulated body that allows them to move through the water, crawl along the seafloor, and manipulate their arms to capture prey.
Does the brittle star have a shell or no shell
Most brittle stars do not have a shell, with the exception of a few species. Instead of a shell, brittle stars have a calcite endoskeleton that forms a "disc" in the center of their body where their arms radiate from. The endoskeleton can sometimes be visible as small plates on the arms or as ossicles (small bones) on the body. The brittle star's flexible body and spiny arms provide protection against predators, rather than a hard shell.
Is the house fly jointed covering over the body or no joint covering
The house fly does not have a jointed covering over its body. Like all insects, the house fly has a hard outer covering known as an exoskeleton that provides protection and support. This exoskeleton is made up of a series of plates known as sclerites that are joined together by flexible membranes. While the exoskeleton is not jointed, the presence of flexible membranes between the sclerites allows for a degree of movement and flexibility. The exoskeleton also provides points of attachment for the muscles that allow the house fly to move and fly. So, the exoskeleton of the house fly is not jointed but is flexible enough to allow movement.
